1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "m_cap.h"
#include "account.h"
/* $ModDesc: Provides support for IRC Authentication Layer (aka: atheme SASL) via AUTHENTICATE. */
enum SaslState { SASL_INIT, SASL_COMM, SASL_DONE };
enum SaslResult { SASL_OK, SASL_FAIL, SASL_ABORT };
/**
* Tracks SASL authentication state like charybdis does. --nenolod
*/
class SaslAuthenticator : public classbase
{
private:
InspIRCd *ServerInstance;
std::string agent;
User *user;
SaslState state;
SaslResult result;
bool state_announced;
public:
SaslAuthenticator(User *user_, std::string method, InspIRCd *instance, Module *ctor)
: ServerInstance(instance), user(user_), state(SASL_INIT), state_announced(false)
{
parameterlist params;
params.push_back("*");
params.push_back("SASL");
params.push_back(user->uuid);
params.push_back("*");
params.push_back("S");
params.push_back(method);
ServerInstance->PI->SendEncapsulatedData(params);
}
SaslResult GetSaslResult(const std::string &result_)
{
if (result_ == "F")
return SASL_FAIL;
if (result_ == "A")
return SASL_ABORT;
return SASL_OK;
}
/* checks for and deals with a state change. */
SaslState ProcessInboundMessage(const std::vector<std::string> &msg)
{
switch (this->state)
{
case SASL_INIT:
this->agent = msg[0];
this->user->Write("AUTHENTICATE %s", msg[3].c_str());
this->state = SASL_COMM;
break;
case SASL_COMM:
if (msg[0] != this->agent)
return this->state;
if (msg[2] != "D")
this->user->Write("AUTHENTICATE %s", msg[3].c_str());
else
{
this->state = SASL_DONE;
this->result = this->GetSaslResult(msg[3]);
}
break;
case SASL_DONE:
break;
default:
ServerInstance->Logs->Log("m_sasl", DEFAULT, "WTF: SaslState is not a known state (%d)", this->state);
break;
}
return this->state;
}
void Abort(void)
{
this->state = SASL_DONE;
this->result = SASL_ABORT;
}
bool SendClientMessage(const std::vector<std::string>& parameters)
{
if (this->state != SASL_COMM)
return true;
parameterlist params;
params.push_back("*");
params.push_back("SASL");
params.push_back(this->user->uuid);
params.push_back(this->agent);
params.push_back("C");
params.insert(params.end(), parameters.begin(), parameters.end());
ServerInstance->PI->SendEncapsulatedData(params);
if (parameters[0][0] == '*')
{
this->Abort();
return false;
}
return true;
}
void AnnounceState(void)
{
if (this->state_announced)
return;
switch (this->result)
{
case SASL_OK:
this->user->WriteNumeric(903, "%s :SASL authentication successful", this->user->nick.c_str());
break;
case SASL_ABORT:
this->user->WriteNumeric(906, "%s :SASL authentication aborted", this->user->nick.c_str());
break;
case SASL_FAIL:
this->user->WriteNumeric(904, "%s :SASL authentication failed", this->user->nick.c_str());
break;
default:
break;
}
this->state_announced = true;
}
};
class CommandAuthenticate : public Command
{
public:
SimpleExtItem<SaslAuthenticator>& authExt;
GenericCap& cap;
CommandAuthenticate(Module* Creator, SimpleExtItem<SaslAuthenticator>& ext, GenericCap& Cap)
: Command(Creator, "AUTHENTICATE", 1), authExt(ext), cap(Cap)
{
works_before_reg = true;
}
CmdResult Handle (const std::vector<std::string>& parameters, User *user)
{
/* Only allow AUTHENTICATE on unregistered clients */
if (user->registered != REG_ALL)
{
if (!cap.ext.get(user))
return CMD_FAILURE;
SaslAuthenticator *sasl = authExt.get(user);
if (!sasl)
authExt.set(user, new SaslAuthenticator(user, parameters[0], ServerInstance, creator));
else if (sasl->SendClientMessage(parameters) == false) // IAL abort extension --nenolod
{
sasl->AnnounceState();
authExt.unset(user);
}
}
return CMD_FAILURE;
}
};
class CommandSASL : public Command
{
public:
SimpleExtItem<SaslAuthenticator>& authExt;
CommandSASL(Module* Creator, SimpleExtItem<SaslAuthenticator>& ext) : Command(Creator, "SASL", 2), authExt(ext)
{
this->disabled = true; // should not be called by users
}
CmdResult Handle(const std::vector<std::string>& parameters, User *user)
{
User* target = ServerInstance->FindNick(parameters[1]);
if (!target)
{
ServerInstance->Logs->Log("m_sasl", DEBUG,"User not found in sasl ENCAP event: %s", parameters[1].c_str());
return CMD_FAILURE;
}
SaslAuthenticator *sasl = authExt.get(target);
if (!sasl)
return CMD_FAILURE;
SaslState state = sasl->ProcessInboundMessage(parameters);
if (state == SASL_DONE)
{
sasl->AnnounceState();
authExt.unset(target);
}
return CMD_SUCCESS;
}
RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
{
return ROUTE_BROADCAST;
}
};
class ModuleSASL : public Module
{
SimpleExtItem<SaslAuthenticator> authExt;
GenericCap cap;
CommandAuthenticate auth;
CommandSASL sasl;
public:
ModuleSASL(InspIRCd* Me)
: Module(Me), authExt("sasl_auth", this), cap(this, "sasl"), auth(this, authExt, cap), sasl(this, authExt)
{
Implementation eventlist[] = { I_OnEvent, I_OnUserRegister, I_OnPostConnect, I_OnUserDisconnect, I_OnCleanup };
ServerInstance->Modules->Attach(eventlist, this, 5);
ServerInstance->AddCommand(&auth);
ServerInstance->AddCommand(&sasl);
Extensible::Register(&authExt);
if (!ServerInstance->Modules->Find("m_services_account.so") || !ServerInstance->Modules->Find("m_cap.so"))
ServerInstance->Logs->Log("m_sasl", DEFAULT, "WARNING: m_services_account.so and m_cap.so are not loaded! m_sasl.so will NOT function correctly until these two modules are loaded!");
}
ModResult OnUserRegister(User *user)
{
SaslAuthenticator *sasl_ = authExt.get(user);
if (sasl_)
{
sasl_->Abort();
authExt.unset(user);
}
return MOD_RES_PASSTHRU;
}
~ModuleSASL()
{
}
Version GetVersion()
{
return Version("$Id$",VF_VENDOR,API_VERSION);
}
void OnEvent(Event *ev)
{
cap.HandleEvent(ev);
}
};
MODULE_INIT(ModuleSASL)
|
